The physicist's greatest tool is his wastebasket.

While I am a convinced pacifist there are circumstances in which I believe the use of force is appropriate - namely, in the face of an enemy unconditionally bent on destroying me and my people.

To understand the world one must not be worrying about one's self.

My comprehension of God comes from a deeply felt conviction of a superior intelligence that reveals itself in the knowable world.

This is what the painter, the poet, the speculative philosopher, and the natural scientists do, each in his own fashion.

I believe that I have really found the relationship between gravitation and electricity, assuming that the Miller experiments are based on a fundamental error. Otherwise, the whole relativity theory collapses like a house of cards.

If you want to find out anything from the theoretical physicists about the methods they use, I advise you to stick closely to one principle: don't listen to their words, fix your attention on their deeds. To him who is a discoverer in this field the products of his imagination appear so necessary and natural that he regards them, and would like to have them regarded by others, not as creations of thought but as given realities.